Table 1.

Occurrence and levels of different microbial parameters in the Llobregat rivera

ValueConcn of:
E. coli(CFU/ml)Somatic coliphages (PFU/ml)Phages infecting O157:H7 (PFU/ml)Phages infecting O157:H7 and carrying Stx2 gene (MPN of phages/ml)
Mean ± SD59 ± 12350 ± 25410 ± 20.18 ± 0.12
Minimum399280.07
Maximum73540150.43
  • a Values obtained from testing of eight different samples in duplicate.